Danfoss internal meshing gear pump for loader
Danfoss Internal Gear Pumps for Wheel Loaders
Danfoss internal gear pumps are specifically engineered to meet the rigorous demands of wheel loader applications, delivering reliable performance, exceptional efficiency, and enhanced durability in harsh operating environments. As a core component of the hydraulic system, these pumps play a critical role in powering key loader functions such as lifting, tilting, and steering, ensuring smooth and precise operation even under heavy loads and frequent duty cycles.
Core Features & Benefits
- Pressure-Balanced Design: Equipped with advanced pressure-balanced load plates, the pumps automatically adapt to varying operating conditions, optimizing volumetric efficiency and minimizing energy losses. This design ensures consistent performance across a wide range of pressure and speed levels, which is essential for the dynamic workloads of wheel loaders .
- Enhanced Durability: Teflon® coated bushings and Viton® seals are standard configurations, enabling the pumps to withstand extreme temperatures, high pressures, and contaminated hydraulic fluids. The robust construction, available in both high-strength cast iron and lightweight aluminum options, ensures extended service life even in continuous heavy-duty operations .
- Low Noise & Vibration: Patented low-noise technology reduces noise emissions by up to 10 dB(A) compared to standard gear pumps, significantly improving operator comfort. The minimized flow pulsation and vibration also help meet strict NVH (Noise, Vibration, Harshness) requirements for modern construction equipment .
- Compact & Flexible Configuration: With a 20% smaller footprint than conventional gear pumps, these internal gear pumps offer high power density, facilitating easy installation in the limited space of wheel loader hydraulic systems. A broad range of shaft drives, integrated valve options, and side/rear port configurations provide great flexibility in system design .
- Wide Operating Range: The pumps support a wide speed range (600 – 3400 rpm) and can handle fluid viscosities from 10 to 1600 cSt, ensuring reliable startup and operation in both low-temperature cold starts and high-temperature working conditions .
Technical Specifications
| Parameter | Range |
|---|---|
| Displacement | 1.2 – 90 cc/rev (covering small to large wheel loader requirements) |
| Rated Pressure | 180 – 276 bar (2600 – 4000 psi) |
| Peak Pressure | 200 – 303 bar (2900 – 4400 psi) |
| Maximum Speed | Up to 3400 rpm |
| Operating Temperature | -30°C (-20°F) to 104°C (220°F) (continuous); up to 115°C (239°F) intermittent |
| Material | Extruded aluminum (lightweight) / Cast iron (heavy-duty) |
Application Advantages in Wheel Loaders
Wheel loaders operate in diverse and challenging environments, from construction sites to mining areas, requiring hydraulic components that can endure frequent load changes and harsh conditions. Danfoss internal gear pumps are tailored to these needs with the following application-specific advantages:
- Reliable Power Delivery: The high power density and stable flow output ensure efficient operation of lifting and tilting mechanisms, even when handling maximum loads.
- Contamination Resistance: The robust design and high-quality materials make the pumps insensitive to oil contamination, a common issue in construction environments, reducing maintenance frequency and downtime.
- Energy Efficiency: The pressure-balanced design minimizes energy losses, contributing to lower fuel consumption of the wheel loader, which is crucial for reducing operational costs.
- Easy Integration: The compact size and flexible mounting options simplify integration into existing hydraulic systems, making them suitable for both new equipment and retrofit applications.
Customization & Support
Danfoss offers a flex program to provide high customization in distribution, allowing the internal gear pumps to be tailored to specific wheel loader models and application requirements. Additionally, a comprehensive range of technical documents, including service guides and installation manuals, is available to support customers throughout the product lifecycle .
